#16073: Python 3 preparation: The semantic of map() function is changed
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Reporter: | Owner:
wluebbe | Status: needs_review
Type: | Milestone: sage-6.4
enhancement | Resolution:
Priority: major | Merged in:
Component: | Reviewers:
distribution | Work issues:
Keywords: | Commit:
python3 | 99e57e20ca0f39d11c00a263f82a9de7d4f836ae
Authors: | Stopgaps:
Wilfried Luebbe |
Report Upstream: N/A |
Branch: |
public/16073 |
Dependencies: |
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Comment (by aapitzsch):
Darij thanks. I hopefully made all the changes you suggested.
Replying to [comment:18 darij]:
> Here is the thing that worries me the most: There are tools for
automatic translation of python2 into 3. I am not sure if we should, or
are going to, release them on the Sage library; but if we are, I would
rather not do any manual work unless we can make sure that it will not
interfere with the automated changes. I have a hunches that a well-written
bot could do better than some of the changes in this patch (for instance,
it should be a rule that `all(map(...))` can stay as it is rather than
being replaced by `all(list(map(...)))`), thus leading to better speed,
whereas with the changes already done it would not simplify them back to
what they should be. This does not speak against edits such as replacing
`list` variables by `list_` and likewise, which are the right thing to do
either way. But I would be wary of making changes that possibly complicate
the situation without knowing that it will become untangled when the time
comes to actually switch to python 3.
These tools don't work well in all cases and usually one can disable
special fixes. So manual work won't interfere with automated changes.
The target of these changes is to simplify the switch to python 3 without
complicating the situation. :)
--
Ticket URL: <http://trac.sagemath.org/ticket/16073#comment:20>
Sage <http://www.sagemath.org>
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